Issue using Auto Differentiation

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Sunetra CV 2020-2-14

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https://ww2.mathworks.cn/matlabcentral/answers/505428-issue-using-auto-differentiation

评论： Sunetra CV 2020-2-14

I have been facing a problem using AutoDiff. Its showing an error when i try to use the code given in Example 6 in the documentation.

% initialize audi grid
[u,v] = ndgrid(linspace(-pi,pi));
[u,v] = ainit(u,v,2);
% define parametrization of a Klein bottle
r = 2;
x = (r+cos(v/2)*sin(u)-sin(v/2)*sin(2*u))*cos(v);
y = (r+cos(v/2)*sin(u)-sin(v/2)*sin(2*u))*sin(v);
z = sin(v/2)*sin(u)+cos(v/2)*sin(2*u);
S = [x;y;z];
% differential geometry
J = ajac(S);                              % Jacobian
Error using  <= 
Matrix dimensions must agree.
Error in audi/sumidx (line 1334)
          f =
          [find(all(J(1:nchoosek(nn+sum(p)-1,nn),:)<=p,2));i];
          
Error in audi (line 48)
      sumidx(r);
Error in ainit (line 42)
  varargout{i} = audi(varargin{i},i,n,k);
 